User justanewb

33 votes

8 answers

20k views

A lily pad doubles in area every second. After one minute, it fills the pond. How long would it take to quarter fill the pond ?

asked Sep 14, 2017 at 22:09

1 vote

2 answers

1k views

7-step binomial tree problem involving baseball betting

asked Sep 28, 2017 at 22:53

5 votes

2 answers

5k views

Proving the weak maximum principle for subharmonic functions

asked Jul 17, 2017 at 23:10

3 votes

1 answer

841 views

Solving the heat equation with a source

asked Jun 6, 2017 at 0:34

4 votes

1 answer

1k views

Solve wave equation with Neumann boundary conditions

asked Jun 12, 2017 at 19:38

6 votes

2 answers

6k views

Mean-value theorem for subharmonic functions:

asked Jul 16, 2017 at 21:09

3 votes

2 answers

2k views

What is the smallest number of integer weights required to exactly balance every integer between $1$ and $40$? [closed]

asked Sep 17, 2017 at 17:33

2 votes

2 answers

489 views

Showing the Fourier sine series converges

asked Aug 2, 2017 at 23:50

2 votes

1 answer

121 views

Energy method in higher dimensions for waves confusion

asked Aug 3, 2017 at 17:36

3 votes

1 answer

1k views

Using an energy argument for the Neumann problem

asked Jul 21, 2017 at 19:44

3 votes

1 answer

399 views

Using an energy argument to prove a solution is unique for a PDE

asked Jul 14, 2017 at 17:42

1 vote

1 answer

150 views

Rayleigh-Ritz approximation, showing the energy is minimized in the linear system

asked Jul 24, 2017 at 18:27

3 votes

1 answer

5k views

Using Green's function on the half-plane, verifying solution is harmonic and satisfies boundary condition

asked Jul 19, 2017 at 20:28

1 vote

1 answer

639 views

Using maximum principle for subharmonic functions to prove an exercise on subharmonic functions

asked Jul 19, 2017 at 2:28

2 votes

1 answer

2k views

Proving the composition of a convex function is subharmonic

asked Jul 17, 2017 at 23:50

1 vote

1 answer

52 views

Finding p-value given a T test statistic

asked Jul 17, 2017 at 20:56

1 vote

0 answers

819 views

Energy argument to prove that the solution to a PDE is unique

asked Jul 13, 2017 at 14:55

2 votes

2 answers

183 views

Solving an inhomogenous system PDE

asked Jul 8, 2017 at 18:00

4 votes

1 answer

1k views

Laplace's equation to solve a system in a square

asked Jul 9, 2017 at 18:30

1 vote

1 answer

71 views

How to apply Parseval's equation and checking to see if we have convergence in $L^2$

asked Jul 10, 2017 at 20:20

1 vote

1 answer

604 views

Finding the maximum of a harmonic function

asked Jul 12, 2017 at 1:16

2 votes

1 answer

12k views

Find the series of the function $f(x) = \cos(x)$ on the interval $[0,\pi]$

asked Jul 7, 2017 at 23:34

1 vote

2 answers

178 views

Showing the sine series on the interval $[0,l]$ converges in $L^2$

asked Jul 7, 2017 at 19:26

0 votes

2 answers

218 views

Parameter or statistic?

asked Jul 6, 2017 at 22:11

0 votes

1 answer

225 views

Probability proportion question

asked Jul 6, 2017 at 22:14

1 vote

1 answer

677 views

Solving the transport equation with an initial condition

asked Jun 30, 2017 at 16:51

1 vote

1 answer

2k views

Fourier sine series of $x^2$

asked Jun 30, 2017 at 1:32

3 votes

1 answer

90 views

Using seperation of variables to solve a PDE

asked Jun 29, 2017 at 23:04

0 votes

2 answers

2k views

Directional derivative, finding the direction in which the slope is the largest

asked Jun 28, 2017 at 20:53

0 votes

2 answers

41 views

Calculus 3, contunity question, what must $c$ be for $f(x,y)$ to be continuous at $(0,0)$ [closed]

asked Jun 28, 2017 at 20:32

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53 Questions

A lily pad doubles in area every second. After one minute, it fills the pond. How long would it take to quarter fill the pond ?

7-step binomial tree problem involving baseball betting

Proving the weak maximum principle for subharmonic functions

Solving the heat equation with a source

Solve wave equation with Neumann boundary conditions

Mean-value theorem for subharmonic functions:

What is the smallest number of integer weights required to exactly balance every integer between $1$ and $40$? [closed]

Showing the Fourier sine series converges

Energy method in higher dimensions for waves confusion

Using an energy argument for the Neumann problem

Using an energy argument to prove a solution is unique for a PDE

Rayleigh-Ritz approximation, showing the energy is minimized in the linear system

Using Green's function on the half-plane, verifying solution is harmonic and satisfies boundary condition

Using maximum principle for subharmonic functions to prove an exercise on subharmonic functions

Proving the composition of a convex function is subharmonic

Finding p-value given a T test statistic

Energy argument to prove that the solution to a PDE is unique

Solving an inhomogenous system PDE

Laplace's equation to solve a system in a square

How to apply Parseval's equation and checking to see if we have convergence in $L^2$

Finding the maximum of a harmonic function

Find the series of the function $f(x) = \cos(x)$ on the interval $[0,\pi]$

Showing the sine series on the interval $[0,l]$ converges in $L^2$

Parameter or statistic?

Probability proportion question

Solving the transport equation with an initial condition

Fourier sine series of $x^2$

Using seperation of variables to solve a PDE

Directional derivative, finding the direction in which the slope is the largest

Calculus 3, contunity question, what must $c$ be for $f(x,y)$ to be continuous at $(0,0)$ [closed]